@misc{KYB_1974__10_3_a6,
     title = {{\CYRN}{\cyro}{\cyrv}{\cyrery}{\cyre} {\cyrk}{\cyrn}{\cyri}{\cyrg}{\cyri}},
     journal = {Kybernetika},
     pages = {272--276},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KYB_1974__10_3_a6/}
}